Fig. 2From: Multi-country assessment of residual bio-efficacy of insecticides used for indoor residual spraying in malaria control on different surface types: results from program monitoring in 17 PMI/USAID-supported IRS countriesResidual bio-efficacy of deltamethrin sprayed on different surface types measured using WHO cone bioassays 2010–2015 in Africa. ^: data label designates instances where testing was ended before mosquito mortality fell below the WHO mortality cut-off of 80%Back to article page